Classifications

• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
  • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
  • C04B28/04—Portland cements
• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
  • C04B28/18—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mixtures of the silica-lime type
• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
  • C04B2111/00034—Physico-chemical characteristics of the mixtures
  • C04B2111/00103—Self-compacting mixtures
• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
  • C04B2111/34—Non-shrinking or non-cracking materials
• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
  • C04B2111/60—Flooring materials
  • C04B2111/62—Self-levelling compositions
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
  • Y02W30/00—Technologies for solid waste management
  • Y02W30/50—Reuse, recycling or recovery technologies
  • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

• the invention relates to a composition of cement, applicable substantially in the building field with the function of self-levelling screed both for internal and for external environments, with remarkable mechanical strength and with excellent quality of acoustic insulation and thermal conductivity, for the consecutive laying of tiles, parquet, linoleum, resin or equivalent materials, and it also relates to a process for manufacturing this composition of cement.
• these screeds have to be reinforced with electro-welded or galvanized metallic nets, that on the one hand they are needed to increase the bending strength, on the other hand they are problematic for the workability of the screed, wherein the thickness are generally very small.
• compositions of cement applicable onto the floors of inhabited environments which are constituted substantially by the combination and the mixing into water of a set on mainly components, as for example waste materials, binder materials of various kind for construction, and aerating additives.
• Said waste materials are substantially constituted by the following elements and their derived products, previously ground into particles of reduced grain, waste of heterogeneous plastic materials, wastes of elastomeric materials (rubbers, etc%), municipal solid waste, wastes of wood of various type, aggregate materials for building industry of various kind, glass remainders of various kind, whereas said binder material for construction are substantially constituted by cement, limes, gypsum of various kind, epoxy resins, and/or acrylic resins, whereas said airing additives are substantially constituted by organic and inorganic surface-active substances, and are adapted to help the mixing and the wettability of the same composition.
• the obtained composition is introduced into cement mixers of similar containers, and is pourable on to the floor by means of pumping through supply means, and it is also pourable into moulds or formworks for forming preformed panels with different shapes and dimensions, which are then applicable into the relative application positions.
• the presence of the airing surface-active substances adapted to increase the wettability of and to help the mixing of the composition of cement, during the mixing phase of the composition of cement, produce very damp air bubbles in a non-controllable quantity that, once the screed has been laid, they tend to go up, that is toward the upper surface of the same screed, therefore, during the plastic shrinkage of the composition, there is formed a body with a very stiff lower part and very fragile upper superficial part and subjected to cracks and/or exhaustion, so not perfect for the laying of any additional upper layer, as for example tails, parquet, ecc..
• the stiffness of the lower part of the screed make this latter more fragile during the thermohygrometric deformations, by producing easily internal cracks and/or a swelling thereof in correspondence of the same cracks or the screed comers.
• the scope of the present invention is to realize a composition of cement that deletes all the above- described drawbacks.
• composition of cement applicable substantially in the building field with the function of self-levelling screed both the internal environments and external environments, with remarkable mechanic strength and with great acoustic insulation and thermic conductance qualities, for the subsequent lying of tiles, parquet, linoleum resin or equivalent materials, and it also relates to a process for manufacturing this composition of cement.
• composition of cement according to this invention is substantially constituted by the following main components mixed to each other, the quantities of which added to each other are always 100% of the final product :
• plastic materials of the heterogeneous type i.e. coloured, light blue, transparent PET bottles, bottles neolithes, aggregates, PE, PP, LDPE, HDPE, EPS etc.
• elastomeric materials rubbers, etc
• polymeric plastic compositions poly- coupled materials, etc
• paper, cardboard, wood and wooden essences of various kind aggregate materials for building
• the above-said materials are ground into grinding means of traditional type (grinder mills, etc%) into particles of reduced grain, in the order of from 2 to 20 mm on average, with subsequent homogeneous mixing of all the ground materials, by means of the use of mixing machines of the traditional type, thereby obtaining a mixture of these waste materials.
• Such a first component a) is used in the quantity comprised between Kg. 0,1 and Kg. 4,5 for each Kg. 100,00 of finished product, according to the desired noise abatement and the thermal conductance ;
• a second component constituted by the materials that will be described and that are mixed with the above-said materials of various kind, described in the point a).
• such a second component is constitute by the following materials :
• both the Portland and the Pozzolanico type adapted to act as binder of the composition ;
• Fluidizer and super-fluidizer additives per se known, adapted to improve the workability of the composition of cement and to reduce the use of water ;
• - Hydroxypropyl cellulose having a viscosity comprised between mPas. 100 and 30.000, preferably between mPas. 5.000 and 15.000, and adapted to include the air bubbles formed during the mixing of the composition of cement, in such a way that the resulting screed be lighter and with a low elastic modulus, and that this produced air doesn’t go up toward the upper surface of the same screed, thereby preventing that such a upper surface is friable.
• this latter is less stiff and therefore it may acquire controlled deformations and thermohygrometric variations without cracks of the obtained finished product, namely the screed.
• composition of cement is constituted by the materials of the two above-said component in the quantities comprised in the following limit- values, and it as already previously indicated with a total value of the 100% of finished product : first component from Kg. 0,100 to Kg. 4,50 for each Kg. 100,00 of finished product ; concrete : from Kg. 15,00 to Kg. 30,00 for each Kg. 100,00 of finished product ; fine sand : from Kg. 60,00 to Kg. 80,00 for each Kg. 100,00 of finished product ;
• aluminium powder from Kg. 0,005 to Kg. 1,00 for each Kg. 100,00 of finished product ;
• Hydroxypropyl cellulose from Kg. 0,030 to Kg. 3,00 for each Kg. 100,00 of finished product ; fluidizer and super-fluidizer additives : from Kg. 0,050 to kg. 3,50 for each Kg. 100,00 of finished product .
• fluidizer and super-fluidizer additives from Kg. 0,050 to kg. 3,50 for each Kg. 100,00 of finished product .
• - Third component constituted by per se known filler, that for example may be constituted by finest siliceous sand, or by calcium carbonates, or by silica, hydrated lime, per se known super- fluidizer additives, such as for example the acrylic polymers (i.e. the Primium PC 20), the poly- carboxylates, the naphthalene polymers such as the naphthalen-sulphonated polymers, and the ligno-sulphonates polymers and further known polymers, and melaminic polymers, in quantity comprised in the following limit- values from Kg. 5,00 to Kg. 30,00 for each Kg.
• such a filler being adapted to regulate, when it is needed, the granulometric scale of the sand according to the component, namely by ensuring the stability of the mixture, and by increasing also the compressive strength of the composition of cement at finished product ;
• Fourth component constituted by retarders of the per se known natural type in the form of powder, and adapted to be used when it is planned the kneading of the composition of cement, object of the present invention, in advance to the processing into construction site, as for example into the concrete mixing pant, in such a way to reduce the moisturization grade of the concrete during the first hours, in the case there aren’t sufficient the ftuidizer and super-fluidizer additives, namely by obtaining a mixture where it is produced an adsorption of the organic products onto the concrete, thereby preventing the moisturization of this latter and by allowing the process of the composition of cement also after various hours and therefore be able to perform a possible transportation, said fourth component being in a quantity from Kg. 0,030 to Kg. 3,00 for each Kg.
• - Fifth component constituted by accelerators, constituted as for example by powder of calcium formate, and adapted to reduce the setting time of the composition of cement and to increase its mechanical strength, and so it is adapted to be mixed with the other components of the composition of cement directly on the working construction site, during climates with low temperatures, by accelerating the setting time of the concrete and/or subsequently the use of the above-said fourth component, in such a way that the concrete is moisturized and the setting time of the composition of cement is brought back to the starting state, said fifth component being in a quantity from Kg. 0,100 to Kg. 5,00 for each Kg. 100,00 of finished product.
• the above-said components used for obtaining the desired composition of cement are mixed with water, which is in a quantity comprised in the limit values from Kg. 10,00 and Kg. 30,00 for each Kg. 100,00 of finished product, according to the sand absorption.
• the process for manufacturing the above-said composition of cement, object of the present invention may consider that, the materials of the above-said first and second components, mixed in a homogenous manner to each other at the dried state, be introduced with the above specified quantities, into suitable per se known containers, as for example barrels, silos, bags or receptacles of various kind of the concrete mixing plants of the traditional type, that are then transported, at a dried state with the sole sand humidity, to construction site where there are present the inhabited buildings into which the foreseen works must be effected, where the water is then added with the above-specified quantities into suitable containers wherein there are contained said first and second components mixed to each other at the dried state, and the obtained mixture is further mixed by obtaining the composition of cement, object of the present invention.
• suitable per se known containers as for example barrels, silos, bags or receptacles of various kind of the concrete mixing plants of the traditional type, that are then transported, at a dried state with the sole sand humidity, to construction site
• the materials of the above said first, second and possible third components may be also mixed together the fourth component and the water, with the above specified quantities, into above said suitable containers and with provide quantities, directly into the concrete mixing plants as already described and then transported to the working construction sites where the foreseen works must be effected, in such a way that the fourth component allows a delay of the setting of the composition of cement, making this latter workable also after various hours ; after, the fifth component is then added and mixed together the mixture obtained up to now, with the above specified quantities, in such a way that the setting time of the composition of cement be brought back at the starting state, namely by cancelling the effect of the fourth component since is no longer necessary.
• composition of cement obtained with one of the above said manners is subsequently introduced into a mixing and delivering pump, or similar means, from which the same composition of cement is applied at work by being poured onto the floor and/or on to the walls and/or onto the floor foundations, for fonning the self-levelling screed, or in alternative from which said composition of cement may also be poured into moulding means (moulds, formworks, etc%), for forming preformed panels of forms, dimensions and different appearing, that are applicable subsequently in the relative installation positions.
• moulding means moulding means

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Ceramic Engineering (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Inorganic Chemistry (AREA)
• Materials Engineering (AREA)
• Structural Engineering (AREA)
• Organic Chemistry (AREA)
• Curing Cements, Concrete, And Artificial Stone (AREA)

Applications Claiming Priority (1)

Publications (1)

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• 2017
  • 2017-11-30 EP EP17847794.9A patent/EP3717436A1/de not_active Withdrawn
  • 2017-11-30 WO PCT/IT2017/000272 patent/WO2019106699A1/en unknown
  • 2017-11-30 PE PE2020000641A patent/PE20201471A1/es unknown

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